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v3.10.0.1

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Operating activities |  |
Net loss | $ (118,930) | $ (67,733)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 2,511 | 2,456
Gain on disposal of property and equipment |  | (32)
Accretion of discounts on marketable securities | (1,146) | (104)
Reversal of deferred rent upon lease amendment |  | (209)
Stock compensation expense | 17,135 | 10,844
Cost of sales - amortization of intangible assets | 8,538 |
Non-cash interest expense | 1,944 |
Changes in operating assets and liabilities: |  |
Accounts and other receivables | (653) | 559
Inventories, net | (12,140) |
Prepaid expenses and other current assets | (907) | (1,841)
Other assets | (2,564) | (936)
Accounts payable | 2,377 | (1,499)
Accrued liabilities and other long term liabilities | 6,164 | (1,274)
Net cash used in operating activities | (97,671) | (59,769)
Investing activities |  |
Acquisition of technology licenses | (11,000) |
Purchases of marketable securities | (187,808) | (192,684)
Proceeds from maturities of marketable securities | 212,700 | 78,298
Purchases of property and equipment, net | (2,838) | (374)
Net cash provided by (used in) investing activities | 11,054 | (114,760)
Financing activities |  |
Proceeds from long-term debt, net | 99,000 |
Proceeds from issuance of common stock, net |  | 169,187
(Tax withholding) proceeds from exercise of stock options and restricted stock awards, net | (529) | 285
Proceeds from Employee Stock Purchase Plan | 594 | 292
Net cash provided by financing activities | 99,065 | 169,764
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (327) | 596
Net increase (decrease) in cash, cash equivalents and restricted cash | 12,121 | (4,169)
Cash, cash equivalents and restricted cash at beginning of period | 27,213 | 24,891
Cash, cash equivalents and restricted cash at end of period | 39,334 | 20,722
Supplemental disclosure of cash flow information |  |
Cash paid during the period for interest | 4,643 |
Release of accrual for litigation settlement and insurance recovery (Note 6) |  | 4,050
Non-cash investing and financing activities: |  |
Disposal of fully depreciated property and equipment | 199 |
Non-cash acquisition of technology license | $ 12,773 |
Common stock issuance costs - cash not paid as of period end |  | $ 110

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Name: | us-gaap_ProceedsFromStockPlans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
Name: | us-gaap_ShareBasedCompensation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration